Salad Dressing
Some salad dressings do not need to go back in the fridge – even after you open them. This is, of course, when you consider the fact that creamy dressings like ranch and thousand islands DO need to go back in the fridge after you use them and open them. Oil-based dressings such as most vinaigrettes, do not need this, though.
Be sure to tightly seal the cap, and you should be good to go. These dressings are often best served at room temperature, too. You can even put vinaigrettes in a food container, such as Pyrex or Tupperware. It works.